It's all about the square area "under" the curve. I'm gonna guess and say that the turbo'ed S6/S7 just has more of it. I would love to know what the avg horsepower/tq numbers are for both of these cars as applied to their respective RPM ranges.

Quote Originally Posted by Ribbonaire View Post
Car and Driver tests an S6 and an RS5.

An Audi S6, which has 420hp, weighs 4255, has a 7 speed DCT tranny – does 1/4 mile in 12.1 secs. 0-60 in 3.7 secs.

http://www.caranddriver.com/reviews/...s6-test-review

And here’s an Audi RS5. With 450hp, (+30hp) and more torque - weighs in at 4040 (that’s 200lbs less! ), same (or similar) 7 speed DCT tranny - but only manages a 1/4 mile time of 12.8. 0-60 of 4.4 secs.

http://www.caranddriver.com/reviews/...ad-test-review

I would imagine if the final drive ratio was dramatically different, so I checked that out and...

FINAL-DRIVE RATIO 4 38:1 for the RS5

For the S6 is 4.093

Again, the RS5 should be faster. Yet...?

What gives?

MY 9 year old RS6 is faster than the RS5 – but weighs more and has an old-fangled slushbox (but same hp.)

Yeah, I know there are differences in asphalt, altitude, temperature, but really...this just doesn't fiture.